﻿namespace ITSSP
{
    using System.Windows;
    using System.Windows.Controls;
    using System.Windows.Navigation;
    using ITSSP.LoginUI;

    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();

			LoginStatus login = new LoginStatus();
			login.LoggedIn += this.UpdateCommandVisibility;
			login.LoggedOut += this.UpdateCommandVisibility;
            this.loginContainer.Child = login;

			UpdateCommandVisibility();
        }

        /// <summary>
        ///     After the Frame navigates, ensure the <see cref="HyperlinkButton"/> representing the current page is selected
        /// </summary>
        private void ContentFrame_Navigated(object sender, NavigationEventArgs e)
        {
            foreach (UIElement child in LinksStackPanel.Children)
            {
                HyperlinkButton hb = child as HyperlinkButton;
                if (hb != null && hb.NavigateUri != null)
                {
                    if (hb.NavigateUri.ToString().Equals(e.Uri.ToString()))
                    {
                        VisualStateManager.GoToState(hb, "ActiveLink", true);
                    }
                    else
                    {
                        VisualStateManager.GoToState(hb, "InactiveLink", true);
                    }
                }
            }
        }

        /// <summary>
        ///     If an error occurs during navigation, show an error window
        /// </summary>
        private void ContentFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            e.Handled = true;
            ErrorWindow.CreateNew(e.Exception);
        }

		private void UpdateCommandVisibility()
		{
			foreach (UIElement child in LinksStackPanel.Children) {
				HyperlinkButton hb = child as HyperlinkButton;
				if (hb == null) continue;

				switch (hb.NavigateUri.ToString()) {
					case "/GuestUserList":
						hb.Visibility = WebContext.Current.User.IsInRole("Admin") ? System.Windows.Visibility.Visible : System.Windows.Visibility.Collapsed;
						break;
					case "/ChangePassword":
						hb.Visibility = WebContext.Current.User.IsInRole("Guest") ? System.Windows.Visibility.Visible : System.Windows.Visibility.Collapsed;
						break;
					case "/Home":
					case "/About":
					default:
						break;
				}
			}
		}
    }
}